Electromagnetic Brake Interlock Function; Base Circuit Shut-Off Delay Time Function; Setting Method [G] [B] - Mitsubishi Electric MELSERVO-J5 User Manual

3.18

Electromagnetic brake interlock function

For servo motors with an electromagnetic brake, this function activates the electromagnetic brake at servo-off, upon an error
occurrence, and at other necessary times. By using the electromagnetic brake, the position can be maintained so that the
servo motor will not move due to external force. When this function is used on a system with a vertical axis, a drop in vertical
lift applications can be prevented.

Base circuit shut-off delay time function

The base circuit shut-off delay time function is used in the following cases to prevent the vertical axis from dropping due to
delayed electromagnetic brake operations:
• Under servo-off command
• At forced stop (EM2 is turned off)
• At alarm occurrence
• At network communication shut-off occurrence
The delay time used between the MBR (Electromagnetic brake interlock) shut-off and the base circuit shut-off can be set in
servo parameters.
• This function does not operate on alarms that are not subject to the forced stop deceleration function.
• When the forced stop deceleration function is disabled, this function does not operate at forced stop (EM2 is
turned off) or upon an alarm occurrence or network communication shut-off.
Precautions
• [G]: This function does not operate when the ready-off command is input. To use this function, set [Pr. PC41.3
Electromagnetic brake sequence output function selection] to "1" (Switched On/Ready to switch on/Switch on disabled).

Setting method [G] [B]

For specifications such as the power supply capacity and operation delay time of the electromagnetic brake,
refer to "Characteristics of electromagnetic brake" in the following manual.
Rotary Servo Motor User's Manual (For MR-J5)
For a selection example of a surge absorber for the electromagnetic brake, refer to "Characteristics of
electromagnetic brake" in the following manual.
Rotary Servo Motor User's Manual (For MR-J5)
Set MBR (Electromagnetic brake interlock) to available with [Pr. PD07 Output device selection 1] to [Pr. PD09 Output device
selection 3].
When the electromagnetic brake is placed in servo-off status, MBR and the base circuit both shut off following a short delay.
Set this delay time (Tb) in [Pr. PC02 Electromagnetic brake sequence output].
Page 176 When using the forced stop deceleration function
Servo parameter
PC02
PD07.0-1
PD08.0-1
PD09.0-1
3 BASIC FUNCTION
174
3.18 Electromagnetic brake interlock function
Symbol Name
MBR Electromagnetic brake
sequence output
*DO1 Device selection
*DO2 Device selection
*DO3 Device selection
Outline
Set the delay time used between the MBR (Electromagnetic brake interlock)
shut-off and the base circuit shut-off.
Initial value: 0 [ms]
Select a function of the output device pin.